@AdenTheThird My nephew wants the DS Pokemon games, and I figured it'd be easier to use a flashcard instead of Twilight Menu. I can dump the carts, so no legal worries for me, and also because some of those Pokemon games are a bit expensive, still, especially HeartGold and SoulSilver.
For me, personally, just in case I lose my carts, and if anyone wants to have their 3DS CFW'd, I can easily do the NTRBootHax thing.
But anyways, that's a bit of a shame. :/ I'm mega cagey about giving out my CC to sites like that, unless it's Amazon or GameStop. But I think I'll wait for more replies till I pin an answer for this.
Prepaid card maybe doesn't support by most flashcard sites online, I tried so many, nds card, 3ds-flashcard, modchipsdirect, r43ds.org, mod3dscard, they all can't do that, so finally use Paypal in Mod3dscard store.